I had an a car accident in 2018 that no one would survive. I broke all my 4 limbs and many bones . i had 15 surgeries and I lived with some disabilities.
Now I am afraid that even if I CTB correctly, my conciousness will jump to another version that survived and I will be even more disabled.
That's not, to my knowledge, how the theory of quantum immortality works.
It's more like there are infinite parallel copies of you right now and if you tried some sort of method, 99.9999% of the infinite versions of you would die, but .00000001% of the infinite versions of you wouldn't die: either the attempt would fail, someone would stop you, some bizarre world event would make it impossible, etc.
As a result, from your perspective you wouldn't die, since the only versions of you who would continue would be the ones that survived the attempt.
It could be that the attempt would result in greater injuries (ie, the only versions of the attempt that fail are the ones where you survive with worse injuries due to the attempt failing in some way).
One complexity in all of this is the resolution of the universe is limited by the plank length, so there may not be infinite versions of you, just so many that it's impossible for a human to fathom. (Plank length is like pixilation if you look at something really close, but it doesn't kick in unless you are really looking very close. In theory it could limit the permutations of matter in space.)
So your consciousness doesn't jump to another parallel realm according to this, so you don't jump backward in time and become more disabled. Humans perceive time in the direction of greater entropy, but time doesn't really exist, just the perception of it caused by more entropy. But quantum immortality doesn't predict a change in how humans perceive entropy and its link to the idea of time. I also don't really understand how consciousness explains why humans experience this sense of now in the present rather than the now in the past or future, since both in theory exist. I also don't know if it's been expernmentally shown that anything other than "now" can be proven to exist.
This doesn't mean quantum immortality predicts you won't become more disabled. What it does predict is any suicide attempt will, from the perspective of the observer, certainly fail. This isn't a mild possibility. If you believe in the multiple world hypothesis, any human consciousness that exists who tries to commit suicide will succeed in some realities and fail in others. It's not like consciousness jumps. It's like there are a billion+ versions of you thinking and perhaps 999,999,994 die and the 6 remaining perceive they are not dead; so "you" as you know it, advance into the future and from your perspective won't die. Those are also made up numbers and the truth is more like 99.9999% of infinite dies, but infinite is still left after.
As far as I know, nothing in this theory indicates an ability to stop time advancing in one direction, letting people somehow go back into the past.
If quantum immortality is scary for you, that's good. It's fucking terrifying and should scare everyone. It also may be completely wrong if the many worlds hypothesis if wrong and if people don't understand quantum physics correctly. I'm surprised more people aren't terrified. The theory predicts that consciousness never dies unless it's mathmatically impossible.
There may be actual physicists on SaSu who could tell you if my understanding is technically flawed. Although, it wouldn't surprise me if zero suicidal physicts need help with suicide and thus none arrive on SaSu.
So in short, your fear of becoming more disabled is valid, the fear of switching to a different reality from back then isn't predicted. The really fucked up thing is the theory predicts already that there are other quantum realities where you were more disabled from that accident and there could be parallele copies of you there already, but from your perspective you will never perceive them.
It's unclear according to my knowledge of this theory if every parallel universe is actually running simultaneously or if somehow a universe is "chosen" through perception somehow. I am pretty sure physicists aren't sure either. (Ie, is wave particle duality collapse with the slit experiment due to parallel realities and one being chosen, but they still all exist? Or do other universes not exist when one is perceived and the wave particle collapses?)
It gets confusing! If anyone understands physics well maybe they can correct this. There is likely flawed analysis in what I wrote. I am no expert.
I am like you by the way. Being alive seems so improbable from my perspective that it hints to me the theory is true. It's also hard to explain it without sounding crazy.
(Disclaimer: please please do not do this!) It's a lot like if a person is suicidal and flips a coin and heads they attempt and tails they don't:
If the person gets tails 10 times in a row, is it random chance, or did they prove the theory? If it's 100 times of tails did they prove it? Also, if the theory is "almost proven" by 100 tails, it still means in another 100 realities the observer got heads and attempted and probably died. So from the perspective of others there is no proof. Quantum experiments like that may not be independently reproducible. You can't prove quantum immortality to others.
Even more fucked up is the plank length suggests simulation theory could be correct, functioning as a type of data compression.
I expect additional attempts may fail... But may still try anyway.
Please do not take any action based on this post. I am not a physicist and it may be 100 percent wrong.
Disclaimer: I do not encourage suicide for anyone.
